State Newton's law of motion.

Explanation

(i) Newton.s First Law : States that " every body continues to be in its state of rest or the state of uniform motion along a straight line unless it is acted upon by some external force".
(ii) Newton.s Second Law : States that "the force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the direction of the force ".
(iii) Newton.s third law : States that " for every action, there is an equal and opposite reaction. They always act on two different bodies.